98 OF THE SENSES OF 
(Algeria Asiliformis of Stephens,) having discover- 
ed a brood in the trunk of a poplar tree, we were 
desirous of securing all that issued from it; and 
haying caught a female, we placed her in a box 
covered with gauze, at the root of the tree, —the 
notion of swrounding the tree itself with gauze, not 
having occurred to us at the moment. As this moth 
is one of the day fliers, we expected to make sure 
of all the males in the neighbourhood ; but, to our no 
small disappointment, not one approached the box, 
though we afterwards enclosed in it another female. 
This was the more remarkable, that, from the pro- 
trusion of the pupa cases from the tree, there was 
evidently not only one or two, but a considerable 
number evolved, after the box had been placed there, 
In 1818, having discovered a beautiful male Crane 
Fly, (Ctenophora pectinicornis of Meiger,) appa- 
rently just disclosed from the pupa, we carefully 
examined the old willow stump upon which it rested, 
expecting to find more of the same brood. Next 
day, we accordingly observed a female, and imagi- 
ning it to be one of the rare species, (Ctenophora 
ornata, or flaveolata,) we placed her in a gauze- 
covered box ; but no male approached for five days, 
when a large hunting spider found means to intro- 
duce himself into the box, and made a meal of her, 
“ There is one extraordinary fact connected with 
this subject, which is worthy of being prominently 
stated, namely,—that after insects pair, and the 
